Aṣọ iwọn otutu giga PTFE (figilaasi ti a bo PTFE) jẹ media àlẹmọ Ere fun awọn ipo to gaju: yiyọ eruku gaasi eefin (simenti, isunmi egbin, awọn igbomikana eedu titi di 260 ° C), isọ omi ibajẹ (acids, alkalis, epo), ounjẹ / ile elegbogi isọdi alaabo, ati Asẹ mimọ HEPA. Ilẹ ti kii ṣe igi ṣe idilọwọ eruku eruku ati gba laaye mimọ. Membrane-laminated grades se aseyori olekenka-kekere itujade.

Aṣọ iwọn otutu giga PTFE n ṣetọju idabobo itanna to dara julọ lati -180 ° C si 260 ° C: resistivity iwọn didun> 10¹³ Ω · cm ni 200 ° C, iduroṣinṣin dielectric nigbagbogbo ni 2.0-2.1. Loke 260°C, PTFE rọra, jẹjẹ loke 327°C, padanu idabobo patapata. Ni isalẹ 0°C, idabobo dara si ṣugbọn bo di brittle. Duro laarin 260 ° C fun iṣẹ ti o gbẹkẹle.

PTFE ga-otutu fabric (PTFE-coated fiberglass) jẹ apẹrẹ fun ounje conveyor beliti nitori awọn oniwe-260 ° C ooru resistance, -70 ° C tutu ni irọrun, ti kii-stick dada, ati FDA ibamu. Awọn ohun elo pataki: awọn adiro ibi-akara (biscuits, akara, pizza), awọn gbigbe ounjẹ sisun, awọn laini itutu suwiti, awọn eefin didi, awọn olutọpa ooru, ati murasilẹ rola. Din egbin ati ninu akoko.

Awọn aṣoju ipari dada ti a lo si aṣọ gilaasi ṣaaju ki ibora PTFE ṣe pataki fun iṣẹ ṣiṣe asọ iwọn otutu giga PTFE ikẹhin. Awọn aṣoju idapọmọra Organosilane ṣẹda awọn afara molikula laarin okun gilasi inorganic ati Organic PTFE, igbelaruge agbara peeli lati <2 N/cm si 4-8+ N/cm. Itọju to dara tun ṣe alekun resistance ooru (260°C+), iṣẹ dielectric, ati resistance kemikali. Aṣọ ti ko ni itọju nyorisi delamination, bubbling, ati igbesi aye iṣẹ kukuru.

Warp ati iwuwo weft ti fiberglass fabric ṣe ipinnu iṣẹ asọ otutu otutu PTFE. Iwọn iwuwo ti o ga julọ npọ si agbara fifẹ ati didan dada ṣugbọn o dinku agbara omije (iyipada U-curve), irọrun, ati ilaluja ti a bo. Awọn iwọntunwọnsi iwuwo to dara julọ, ilaluja yiya, irọrun, ati ipari dada. Kekere iwuwo ipele ti ìmúdàgba atunse; iwuwo giga fun ti kii-stick ati idabobo.

Calendering – titẹ PTFE-ti a bo fabric laarin kikan digi rollers ni 360-380 ° C – bosipo paarọ dada mofoloji, Tu-ini, impermeability, ati darí iṣẹ. O dinku roughness lati Ra 0.5-1.0 μm si <0.05 μm, edidi awọn pinholes, ṣe ilọsiwaju resistance resistance, ṣugbọn dinku agbara omije ati irọrun. Pataki fun awọn laini idasilẹ ati idabobo itanna.

Apẹrẹ weave fiberglass - itele, twill, tabi satin - ni pataki ni ipa lori awọn ohun-ini aṣọ iwọn otutu giga PTFE. Satin weave nfunni ni agbara omije ti o ga julọ (2-3x pẹtẹlẹ) ati irọrun, o dara julọ fun titẹ agbara. Weave pẹtẹlẹ pese iduroṣinṣin onisẹpo ti o dara julọ ati ifaramọ peeli, ti o baamu fun awọn ohun elo aimi. Twill ṣe iwọntunwọnsi gbogbo awọn ohun-ini fun lilo gbogbogbo.

Isọda aṣọ ti aṣọ otutu otutu PTFE ni ipinnu nipasẹ awọn ifosiwewe mẹrin: ilana ti a bo (iwọn patiku 0.15-0.35 μm, viscosity, ri to content), bo & sintering process (afẹfẹ abẹfẹlẹ fun iṣọkan), didara sobusitireti (apẹẹrẹ weave, pre-itọju), ati agbegbe iṣelọpọ (20-25 ° C, <60% RH). Dip + abẹfẹlẹ ni idapo ilana iwọntunwọnsi ilaluja ati dada smoothness.

Didara to dara ati itọju fa igbesi aye ti PTFE aṣọ iwọn otutu giga. Mọ lẹhin lilo ati lẹhin itutu agbaiye. Lo awọn gbọnnu rirọ, awọn ifọsẹ didoju, tabi oti fun awọn abawọn. Maṣe lo awọn acids/alkalis lagbara, Bilisi, tabi awọn scrapers irin. Lubrication epo silikoni deede dinku yiya. Tẹle awọn itọsona wọnyi lati yago fun ibajẹ ti a bo.

Aṣọ iwọn otutu giga PTFE ati aṣọ silikoni mejeeji lo asọ gilaasi bi ipilẹ ṣugbọn yatọ ni ohun elo ti a bo (PTFE resin vs silikoni roba). PTFE tayọ ni ti kii-stick, wọ resistance, ati kemikali resistance to 260°C. Aṣọ silikoni nfunni ni irọrun ti o ga julọ, idabobo itanna, ati idena ina (to 230°C). Yan da lori rẹ ni ayo.